Machine for grinding rollers and the like.



J. KIRNBR. a MACHINE IOB GRINDING ROLLERS AND THE LIKE. uruonlonrnnn NOV.19, 1910;

Wiffiss I Patented Jul is, 19.12,

UNITED STATES PATENT Om r.

J'OSEF KIRNER, F STUTTGART, GERMANY, ASSIGNOB TO NORMA COMIANY G; M. B. H., 015 STUT'IGAR-T, GERMANY.

MACHINE FOR GRINDING ROLLERS AND THE LIKE.

Applicat'ion filed November 19, 1910. Serial No. 593,252.

in contact with the rollers and one of which is formed as usual of metal and the other of an abrasive material, and at the same time altering their distance away from the center of the disks. The sliding friction necessary for grinding must arise in consequence of the difference in speed of the disks at the outer and inner ends of the cylindrical parts of the rollers.

An example of construction of the roller grinding machine is shown as an example in the accompanying drawings.

Figure 1 is a side View; and Fig. 2, a plan view of the grinding disks of the machine with an arrangement, drawn on an enlarged scale, for movingforward the rollers; Figs. 2 and 2 are sections on the lines aa and. bb of Fig. 2; Fig. 3 is a plan view of a special. formof construction of a cage guiding the rollers.

The machine frame 1 receives an inclined shaft 2 on which a grinding disk 5 of an abrasive material, operated by means of a worm wheel 3 and worm l loosely revolves, while a disk 6 made of metal does not rotate on the shaft 2 but may be' displ aced' axially thereon under the action of a spring 7. T he rollers 8 to be ground are guided in a cage 9 which is concentrically and also loosely mountedon the shaft 2 and provided with radial hollow walled slots 10, in which the rollers are held so as to be longitudinally displaceable after they have been introduced through an externally provided recess 11 in the edges of the slot. holding. the rollers. On the rotation of the disk.5 the rollers travel between the disks 5 and Gwhich are pressed against them, the cage 9 being carried along 1n the same direction in which the disk 5 rotates, but at only half its speed of rotatron. Now in order to prevent the rollers Specification of Letters Patent.

forming grooves or fiutings in the rotary.

grinding disk, they are gradually moved in ward 1n the slots of the cage by means of a mechanism for pushing them fgrwar'd. The

cage is for this object provided on its'outer ring with an annular slit or groove 13, in which can enter a slide 14: mounted in a casmg 31, past the face 15' of which slide the outermost lying rollers, in slots in the cage.

The longitudinal movement of the rollers between the two disks isfacilitated by providing the stationary disk'6 witha shallow recess 29 at the place at which the pushing forward takes place, The slide 1 1 is on the one hand under the action of a spring 16 which bears against a plate 17 fixed in the casing 31 and, on ,the other hand, under the action of a cam d sk 18, which'is rotated by a. ratchet wheel 19. The movement of the ratchet-wheellis produced by a pawl 20 on an arm 21 whichdsl0osely mounted on the shaft 22 of the ratchet wheeland the cam disk 18, and carries at its outer end a roller 23 which at each revolution of the cage 9 is forced outward by its cam-2i, after which under the influence of the weight of the arm 21 it is again moved inward.

Inthe drawings it is assumed that in the perforation of the cage 9, which perforation faces the direction of movement, a new roller 8 has just been inserted. This is done in the following way:The rollers of the pile of rollers coming in front of the slide or pusher l r' are gradually displaced inward by the pusher in its position shortly before the position shown, by means of the ratchet mechanism so that the outermost roller is completely moved from under tze recess 11 of the edges of the slot. By toe next oscillation of the arm 21 by the cam 24: the cam disk 18 is moved out of the position, which corresponds to the outermost position of the slide, so far that its tooth 25 slips past the projecting shoulder 26 ofthe slide 14, whereupon the slide, underthe action of the spring 16, snaps back into the position shown in Fig. 2 and bears with its shoulder against the rising upper face 27 of the next tooth of the cam'disk. By this means an aperture, for the admission of the rollers, provided in thegfixed upper disk 6is Patented July 16, 1912. I

uncovered and a roller passes out of the ther rotation of the cogs, it fresh roller 1 I it passes into each slot until ell ere titled ofresh. When the rotation Qfllllfi cage is completed the slide ht is again pushed word, a. reciprocetory movement heiug made, at each fresh rotation of the cage, oy the pawl arm 23. loy means of the com The rollers are removed from the cage 9 through an aperture 34) in the stationary disk 6, as soon as the rollers have been pushed by the slide 14: so for inward that the innermost rollers have come' entirely ithin reach. of the recesses 12 of: the cage. Uh the rotation of the cage these recess s successively coincide With the aperture 30, so that the rollers utter given runnherof revolutions of the cage, drop out of them-- selves under the influence of gravitation, in consequence of the suitably inclined posi tion of the dish; 6. In order to prevent the rollers dropping; out of the slots it), e rinp32 provided thesis-o'er port of the machine, which ring enters recess of the cage 9.

The inclined arrangement of the disks not only facilitates the construction of the arrangements for feeding and. removing the A rollers, but also facilitates the running cit of the Washing fluid carrying envoy the Waste from the grinding. The sction of the machine a. Whole is not affected by.

qrr n i t d "l di "l" t. urging no so some. 1m u lemo and it may therefore either be assumed, as

in the present specification, that only one of the two disks rotates While the cage rototes at half the speed, or both dislrs may be rotated in opposite directions, in which case the cage remains stationary. The rollers are then pushedforvvsrd by a device which rotates with the rotating; metal dish, and is thrown into action by encountering a, catch 24: The axial movement of the rollers may also take place from the lEiSldE to the outside. Finally, the grinding action niey'elso ,be im'reesed by melting theperforetions oi the cage not exactly radially but parallel With radii Fear the center, whereby the rollers are caused to slide lon itudinclly. Such a. form of cage is shown in. Fig. 3. its the t1'1ct1on ot the rollers on the metal disk is less than on a. disk formed of abrasive nice 'teriel, power for pushing forward the rollers is here also provided which is directed from, the outside to the inside when the grinding disk has the direction ofrotetion. indicated by an orrov/ in Fig. 3 and from the inside to the outside in the opposite direction ofrotetion. The pushing forward may therefore here he done automatically by the rotating disk and the feeding in and removal of the sellers is all that has to he providodl'm' which operations may be done.

in similar manner to that employed in the form. at construction of the roller grunting machine shown 1n Figs. 1 and 2., it both sive material musthe supplied in pulverulent rm, ti: automatic the rollers no longer takes place, because the undergo equal friction on both sides 1 cm the dislts. In case in order to ohmic motic displacement, the frico disks with the rollers'must for instance, by employing different met for the disks.

I declare that what I claim is l. e, n ling machine, the COIIP binotiou of two disks, means for rot-sting sold disks relatively to each. other, a. cage helJWQGIl the t adopted for holding and guiding roll or the like, and means sep- *e from "isl'zs for positively moving re; me cage While the disks-ere .ti thereon. lo 3. roller grinding machine, the como disks, moons for rotating {U137 to each other, e cage hehiretioo oi sci r' rss 1": tween the disks and guid rollers or the like, end means separate tron]. the disks for positively moving the ro ers from the outer portions of the disk to 4rd the central portions of the letter While the disks are ooereting thereon.

3, in roller grinding machine, the con1- hiiootion two llSliS, means for rotating said disks relatively to each other, a cage ard between the disks having means for ran hol ng and. guiding rollers, or the like, and

it slide movable between the disks to posi tively move the rollers with respect to the cage While the disks are operating thereon.

.4. in a rollergrihding machine, the combination two disks, means for rotating said disks relatively to each other, a, cage orrenged between the disks h-uving'means for disks and having straight slots to receive and guide the rollers, or the like.

6. in e. roller grinding machine, the comhinatioie of two disks, means for rotating said disks relatively to each other, a. cage concentrically mounted between said disks and having strsigl'it slots to receive and guide the rollers, or the like, and means sepcrate from the disks for positively moving the rollers in the slots of the cage While the disks are operating thereon.

7 a roller grinding machine, tlie comloinet on of tii'f) disks, means for rotating and having slots for holding displacement of y tween the said disks and having slots in the.

said disks relatively to each other, means for introducing and removing the rollers into and out of the space between the disks, respectively, and means movable radially in the space between the disks for positively moving the rollers independently of the movement imparted thereto by the disks.

8. A roller grinding machineconsisting of two disks, means for rotating these disks relatively to each other, a cage arranged between the said disks and having slots for holding and g'uiding the rollers, means for positively moving the rollers axiallyalong the saii slots, meansfor introducing and removing the rollers into and out of the cage.

9. A roller grinding machine consisting of two disks, means for rotating these disks relatively toeach other, a cage arranged between the said disks and having slots for holding andguiding the rollers, there being a slit provided in the edge of said cage, a slide adapted to enter said slitand push rollersjinward, means for introducing and removing the rollers into and out of the cage;

10.'A roller grinding machine consisting of two disks, means for rotating these disks relativeiy to each other, a cage arranged becage for holding and guiding the rollers, there being a slit provided in the edge of said cage, a slide adapted to enter said slit and push rollers inward, a cam operated by pawl and ratchet gear for moving the said slide, means for introducing and removing the rollers into and out of the cage.

11. A roller grinding machine consisting of an upper stationary disk of metal, a lower rotatingdisk of abrasive material, means ce ss opposite the said slide to allow rollers to move freely, means for introducing and removing the rollers into'and out of the cage. t

In witness whereof, I have hereunto signed my name this 25 day of October 1910, in the presence of two subscribing Wit- JOSEF 'K' RNER. I

VVitnesses:

GUSTAV TAUsLY, Anonr Bn'osy. 

